atl1: add value to check ability of reenabling IRQs

Unfortunately it is not clear from code is usage of
IMR register possible or not. So, to prevent possible
side-effects of reading this register i prefer store
interrupts enable flag separately.

Signed-off-by: Tony Zelenoff <antonz@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/ethernet/atheros/atlx/atl1.h b/drivers/net/ethernet/atheros/atlx/atl1.h
index 71bb50dfc5fa..117a0da360b8 100644
--- a/drivers/net/ethernet/atheros/atlx/atl1.h
+++ b/drivers/net/ethernet/atheros/atlx/atl1.h
@@ -783,6 +783,12 @@ struct atl1_adapter {
         u16 ict;                /* interrupt clear timer (2us resolution */
         struct mii_if_info mii; /* MII interface info */
 
+        /*
+         * Use this value to check is napi handler allowed to
+         * enable ints or not
+         */
+        bool int_enabled;
+
         u32 bd_number;          /* board number */
         bool pci_using_64;
         struct atl1_hw hw;
diff --git a/drivers/net/ethernet/atheros/atlx/atlx.c b/drivers/net/ethernet/atheros/atlx/atlx.c
index ee83e1cc8b20..95975b5b7f70 100644
--- a/drivers/net/ethernet/atheros/atlx/atlx.c
+++ b/drivers/net/ethernet/atheros/atlx/atlx.c
@@ -169,6 +169,7 @@ static inline void atlx_imr_set(struct atlx_adapter *adapter,
 static void atlx_irq_enable(struct atlx_adapter *adapter)
 {
         atlx_imr_set(adapter, IMR_NORMAL_MASK);
+        adapter->int_enabled = true;
 }
 
 /*
@@ -177,6 +178,7 @@ static void atlx_irq_enable(struct atlx_adapter *adapter)
  */
 static void atlx_irq_disable(struct atlx_adapter *adapter)
 {
+        adapter->int_enabled = false;
         atlx_imr_set(adapter, 0);
         synchronize_irq(adapter->pdev->irq);
 }